Finding the Third Proportional to 212,913 and 333,998

Step by Step Solution

1. Step 1: Write the proportion equation
   212,913 : 333,998 = 333,998 : x
2. Step 2: Convert to fraction form
   212,913/333,998 = 333,998/x
3. Step 3: Cross multiply
   212,913x = 333,998 × 333,998
4. Step 4: Simplify right side
   212,913x = 111,554,664,004
5. Step 5: Solve for x
   x = 111,554,664,004/212,913
6. Step 6: Final answer
   x = 523,944.82